Brown University study finds deficient Brazilian soils hold on to phosphorus while rich Iowan farmland is spoiling waterways even though much less of the fertilizer is being applied
A new American study has turned a long-held belief on its head by discovering that — in one respect, anyways — growing soybeans in Iowa is environmentally worse than growing them in the former Amazon rainforest. Researchers from Brown University found Iowa farmers are doing more harm to waterways than their counterparts in Matto Grosso,
